This auction features a Hsu Research VTF-1 MK3 powered subwoofer in excellent condition This auction includes the manual and power cable. The bidding rules are: I reserve the right to cancel bids from folks with excessive negative feedback; the winning bidder must contact me to arrange payment within 48 hours of auction's end. Download Definitive Technology Pf15tl Manual. The lower the prices, the more subs SVS sells. Download Hsu 12hek03 R2 Manual Meat. SVS SB-12plus or HSU VTF-3 MK3 Subwoofers. Download Haier HSU-18LEA03 Manual (Total Pages: 20) for free in PDF. Full Comparison between HSU VTF-2 MK5 and SVS PB-2000. HSU VTF-2 MK5 vs. Manuals and User Guides for HSU VTF-2 MK2. We have 1 HSU VTF-2 MK2 manual available for free PDF download: Manual Hsu VTF-2 MK2 Manual (12 pages). So the current VTF-2 Mk3 in extended bass mode has a frequency response that measures something like +/- 0.5db from 16-200Hz when measured outside. However, the VTF-3 Mk2 is a bit more powerful in terms of maximum output due to the more powerful amplifier that it uses. In your case, I'd probably go with a VTF-3 Mk2 used. Originally Posted by Bernie7 /t/1450518/hsu-vtf-2-amp-repair-options#post23071430 This might help someone with a similar fault. My VTF-2 Mk I developed a low frequency noise. I changed some capacitors in the amp board and now it is fine! Here are the caps I changed: 47uf 25v 1pc 100uf 16v 3pcs 10uf 50v 2pcs.
Taking stock of the Hsu VTF-2 mk5, we might judge itin comparison to its similarly priced competition. At its price point, I don’tknow of any other subs that can quite match its overall performance. There aresome subs of similar cost that do have more mid bass output, but they do notcome close to the VTF-2’s deep bass output or flat frequency response. I cannotthink of any other subwoofer in this price bracket that can match its deep bassperformance. Move the budget up a couple hundred dollars and you can grab a SVSPC-2000, and you can get more outputcapability under 30 Hz, but you do lose maximum output capability above 40 Hz.There are some subwoofers that have a smaller size and nicer finish for similarcost, but they do not come close to its performance. Then again, not everyonecan handle a subwoofer the size of the VTF-2 mk5, and that is a compromise somepeople must make.
Another yardstick by which to measure the VTF-2 mk5is how does it compare to its predecessor, the mk4. According to Hsu’s CEA-2010measurements for both, the mk5 beats the mk4 by roughly 2 dB in burst outputbelow 40 Hz and by about 3 dB at 40 Hz and above. That is a very substantialmargin; effectively a 25% to 50% boost in performance for a subwoofer thatcosts a bit less. However, one factor in those higher measurements may bepartly due to the mk5 having both ports and driver on the same surface, whichis different from the mk4’s design. This can be advantageous for this type oftesting, but it does not nearly account for the full extent of the gains beingseen here, not even close. In comparing the mk5 to the mk4, it should be saidthat the mk4 did have a finer satin black finish than the mk5’s vinyl black,and the hidden driver and ports gave it a sleeker appearance. On the otherhand, the mk5 does look brawnier without the grille, which is perhaps notsomething everyone can appreciate but is an aesthetic that this reviewer digs.
It is difficult to find something reasonable tocomplain about with this subwoofer. One thing I mentioned to Hsu Research wasthat the gain knob is a bit sensitive, as it rises at a logarithmic rate. Theyagreed, and future models will be seeing a more gradual gain structure, so eventhat tiny nitpick is now moot. Another area of improvement that it would benice to see addressed in the VTF-2 mk5 is the bracing. While the paneling issturdy and there is a piece of bracing midway in the sub on the lower half ofthe cabinet, I wouldn’t mind seeing something that reinforces the cabinet atthe midsections on all the free panels. However, this critique is more forpeace of mind than anything sensed during actual listening, since, as notedpreviously, I didn’t hear anything that I thought might be cabinet resonance,and the cabinet does not feel to be flexing when touching it during playback ofloud content. It’s worth mentioning here that the protection filters work verywell on the VTF-2 mk5; this is a subwoofer that will not overdrive easily.Unless the user turns the gain knob to maximum level, and blasts some 10 hztest tones at full volume, there is no way to bottom out the sub. In otherwords, the user would have to deliberately be trying to overdrive the subwooferin order to accomplish that task.
To bring this review toa close, anyone looking for a subwoofer in the $600 point ($539 + $60 shippingfor continental US) would do very well to consider the Hsu VTF-2 mk5. Itsoverall performance and feature set is one of the best, if not the best, thatcan be had at this price. It achieves our Bassaholics “Large” room sizerecommendation in the ported modes (meaning it is suitable for rooms from3,000^ft3 to 5,000^ft3), except the sealed mode, which nets the “Medium” room sizerecommendation (room sizes of 1,500^ft3 to 3,000^ft3). The VTF-2 mk5 is theleast expensive sub to capture the “Large” room size recommendation, which is anice new precedent for those looking for the most bang for their buck (moreinformation can be learned about our Bassaholic Room Size Rating.) The VTF-2 mk5 alsocarries a feature set that is uncommonly good for subwoofers in this pricerange as well. Along with the hardware, the buyer also gets Hsu’s well-regardedcustomer service, a 2-year warranty on the amp (upgradable to a 5-year warrantyfor an additional fee), a 7-year warranty on the driver, swift shipping, goodpacking, and a subwoofer with manageable size and weight that isn’t an eyesoreand doesn’t need a two-man team to move around. I have to give the Hsu VTF-2mk5 a strong recommend for what it brings to the table for the cost, and if Iwere shopping for a subwoofer at its price point, it would very likely be myfirst choice.
by— September 28, 2017
- Product Name: VTF-1 mk3 Subwoofer
- Manufacturer: Hsu Research
- Performance Rating:
- Value Rating:
- Review Date:September 28, 2017 00:00
- MSRP:$399.00 (+ $54 Shipping / Handling)
- 10” driver, ported enclosure
- 250w continuous amplifier
- 30 Hz- 90 Hz crossover frequency range, by-passable
- 24dB/octave crossover slope
- 0°/180° phase switch
- L/R Unbalanced inputs
- L/R Speaker-level inputs
- 0.7-0.3 Q control
- 300-watt power outletrequirement
- 42 lbs.
- Enclosure Dimensions:18.5”H x 14.5”W x 17”D
- Dimensions w/ feet,grille, amp: 19.5”H x 14.5”W x 19”D
- 7 years woofer warranty/2 years amplifier warranty
Pros
- Accurate bass reproduction
- Affordable
- Good extension for the price
- Not large and not heavy
- Variable tuning points offers a significant difference
Cons
- Single port mode can chuff obtrusively in very deep bass at high drive levels
- Sealed mode doesn’t really do much
We started our Hsu Research VTF-2 mk5 review off by noting its relatively long history and evolution since its initial appearance. Hsu’s VTF-1 hasn’t been around as long as a model name, but its inception is so closely related to the original VTF-2 that it has to be considered an extension of that product line. The VTF-2 line started with 10” drivers and very similar cabinet dimensions and tuning points as the VTF-1, but the VTF-2 name was promoted to a line of medium sized 12” subwoofers, and the 10” variable tuning subwoofers were given the name ‘VTF-1.’ Essentially, the VTF-1 carries the form that the VTF-2 started with. In evolutionary terms, this would be called common descent: two different organisms that share a common ancestor.
The VTF-1 mk3 makes a more radical change to its form than the mk2, which only added a Q control from the mk1. The mk3 rearranges the cabinet by placing the driver and ports in front. It also gives the amplifier a boost from 200 watts to 250 and makes some alterations to the driver. Rubber feet replace spiked feet, and the satin black finish is now a smooth vinyl finish. Hsu also claims a very significant performance increase moving up to the mk3 along with a substantial price drop. This brief history of the VTF-1 has led us here with the mk3 in our hands, and we will see how these many layers of refinements over the years add up as a subwoofer in our review.
Unpacking and Appearance
The VTF-1 mk3 arrived sandwiched between eight thick foam blocks on every corner that kept the subwoofer away from the box sides and protected it from bumps and shocks. It was bagged in a soft foam wrapping to protect it from scuffs, and a thick plastic bag around the foam bag to protect it from moisture. Since it is not a massive or heavy unit, these efforts should be more than sufficient to keep the it safe during shipping.
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Out of packing, its looks like a fairly typical subwoofer. The vinyl finish has a smooth sheen that is nice, although, as with the VTF-2 mk5, it seems to be somewhat of a downgrade from the satin black finish of the previous mk2. The rounded edges do soften its appearance, especially with the grille on. It is not a very large sub, at least in comparison to the subwoofers I normally review. It should be able to disappear in a dimly lit corner without problem if the user does not want it to stick out. Without the grille, it does look functional with the driver, ports, and grille guides on display. I do like the shiny inverted dustcap of the cone. The VTF-1 mk3 looks like a smaller VTF-2 mk5.
As with other variable-tuning subwoofers, new owners are advised to read the manual to operate them properly, even more so than with regular subwoofers. They are not quite as simple as plug-and-play if you want to get the most out of them. Owners would do well to understand how sealing the ports combined with onboard equalization mode will affect the system.
Design Overview
The VTF-1 mk3 looks like a smaller VTF-2 mk5, because, in many ways, it is a smaller VTF-2 mk5. It shares the same amplifier technology, same cabinet construction and design; only the sizes are different. As with the VTF-2 mk5, the cabinet paneling of the VTF-1 mk3 uses 3/4” MDF, except for the front baffle which is 1.5” thick. There is a piece of cross-bracing supporting the two 12.5” long ports. Each port has a 3.5” diameter. The cabinet is lined with polyfill. The rubber feet are the same, as well as the grille construction that uses rounded metal pins for the grille guide sockets.
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Inside view of VTF-1 mk3 Subwoofer
The ‘VTF’ in the VTF-1 stands for Variable Tuned Frequency, which is the system that allows the user to adjust the extension of deep bass. For those who are not familiar with how this system works, we will quote from our VTF-2 mk5 review:
“The function of ports on speakers and subwoofers is to produce sound more efficiently at low frequencies than the drivers are able to. They do this by using the backward motion of the woofer into the cabinet to resonate the air mass within the port. The port’s length and width affect the frequencies at which the port generates sound; the longer a port is with respect to its width, the deeper frequencies it will produce. However, the wider a port is, the more output it will generate at its resonant frequency. Placing multiple ports in a speaker or subwoofer will act like one port that has the width of all the ports combined. In systems such as Hsu’s VTF subwoofers, the user can exchange output headroom at higher frequencies for lower frequency output by plugging one of its ports, thereby increasing the length of the ports with respect to their collective width. This enables the subwoofer to play deeper frequencies far more effectively but at the cost of output potential at some frequencies above that point.”
The driver looks adequate for the task but not heavy-duty. It is largely assisted by the generous cabinet size and port area. It uses a stamped steel basket, a decent sized Nomex spider for a 10”, a 2” voice coil, and a single 5” x ¾ magnetic slug. We can see that the backplate has been bumped out to make room for higher excursions, and there is a hole in the pole piece for ventilation. Hsu informed me that the driver uses a shorting ring. On the whole, the driver looks adequate for the task at hand.
The VTF-1 mk3 amplifier is similarly a scaled version of the VTF-2 mk5’s amp. For the VTF-1 mk3, Hsu has upgraded the BASH amplifier to a 250-watt unit, up from the 200-watt amp of the mk2. The BASH (Bridged Amplifier Switching Hybrid) amplifier technology combines the sound quality of AB amplifier topologies with the high efficiency of Class D amplifiers. Among the features of the VTF-1’s amplifier, a Q control is used to manipulate the slope of the low-end roll-off. Speaker-level inputs allow the subwoofer to be used with systems that do not have an LFE output or a line-level output. An adjustable low-pass filter ranging from 30 Hz to 90 Hz gives users control over the subwoofer’s bandwidth for setups that lack bass management. A voltage input switch makes the subwoofer usable in countries with different electrical standards.
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I may be the odd man out here, but, I use the near field set up today for my little subwoofer and if I replace it with a Hsu I would still do that. Because I'm in a near field listening setup for music, the choice to measure it smack dab behind the listening position makes me smile ! I liked the completeness of the review. Reviews like this give me confidence in making a future selection. Reviews like this and I can call Pogre up and have him come over and make recommendations in person. That does the trick.
William Lemmerhirt, post: 1212839, member: 81215All of my review subs get placed in that near-field position, because it offers the flattest response for a single sub in my room for my listening position, not because it provides an higher tactile sensation. So the VTF-1 is on a fair footing with the other subs in my reviews, at least for the subjective experiences. If I placed it anywhere else, it would not be fair to it with respect to other subs I have reviewed.
Nice review, but I think the near field review should be accompanied by another one with placement more akin to where most people will use it. As you said shady, it wouldn’t be fair to intentionally place the little 10 in a spot to a disadvantage but conversely, a near field review is equally unfair. (Most people won’t be able to see through the disclaimer early in the review about typical placement behavior).
We just have to encourage prospective subwoofer buyers to take the time to place the sub in an optimal position to get good results. Great subwoofers can be made to sound terrible with poor placement, and mediocre subs can be made to sound passable with good placement. It is such a huge factor in how a subwoofer will sound in room that it can not be stressed enough.
William Lemmerhirt posts on September 28, 2017 12:58
![Hsu Vtf 2 Mk3 Manual Hsu Vtf 2 Mk3 Manual](https://reader015.vdocuments.net/reader015/html5/0707/5b3ff4ca9ee2a/5b3ff4cba87cd.jpg)
Nice review, but I think the near field review should be accompanied by another one with placement more akin to where most people will use it. As you said shady, it wouldn’t be fair to intentionally place the little 10 in a spot to a disadvantage but conversely, a near field review is equally unfair. (Most people won’t be able to see through the disclaimer early in the review about typical placement behavior).
Hsu Research Vtf 2
another excellent review James
Hsu's latest subwoofer, the VTF-1 mk3, is a little powerhouse on paper with a 10“ driver, 250 watt amplifier, and dual 3.5” diameter ports. We have been interested in seeing what it can do ever since it was announced late last year. Now that we have finally had a chance to give it a few laps around our test track, we are ready to report what is delivered from Hsu's $400 subwoofer (price not including shipping). Read our review of the VTF-1 mk3 to learn about this point of entry to high-fidelity subwoofage.
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Read: Hsu Research VTF-1 mk3 Ported Subwoofer Review
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Read: Hsu Research VTF-1 mk3 Ported Subwoofer Review