Welcome to the club. I have the Bartók and the HPA4, same as the LA4 but with an extra headphone amp.
I have set my Bartók to 6V out and 0dB, and connected its XLR out to the XLR input 1 on the HPA4, the HPA4 XLR out to my power amp in.
That’s all. You could go into the menu of your LA4, and change its standard Input 1 name to BARTOK.
Congrats with your purchase and good deal, and I look forward to hear if you like what you hear.
Stereophile recently compared the LA4 with the new PassLabs XP-32. What an honour to the LA4, considering it is about 7 times less expensive than the XP-32! However…
I had two high-performance preamplifiers on hand with which to compare the Pass XP-32: the MBL N11 ($14,600) and the Benchmark LA4 ($2599).
While the LA4 is considerably less expensive than the Pass XP-32 and MBL N11, its measured performance is on par with that of those two technical high-fliers.
The LA4 ($2599) is an excellent preamplifier, especially considering its price, but it was outclassed by the XP-32 ($17,500).
I think Ernos has said almost everything. I have the HPA4 too, with Vivaldi. As you’ll have seen from the Benchmark manual, it is intended to work with both typical consumer and pro signal levels, so is very happy with a dCS 6V output. My setup is essentially the same as Ernos describes. Btw, if your ATCs have variable input sensitivity, you might want to find out the setting with the highest S/N ratio. The power amp that I feed from my HPA4 has two gain settings, and the lower one has the highest S/N. There is helpful discussion about gain and distortion in the Benchmark manual. And, yes, set your Bartok to 0dB. Finally, it is possible in the Benchmark menus to ‘mute’ unused inputs. I couldn’t say whether it improves the sound! And now all you need is a subwoofer to plug into that lonely looking mono XLR output on the back of the Benchmark…
Congratulations on your deal. I think I achieved something similar, but had bought the power amp at about the same time and so had scored a few points with the dealer so to speak. The dealers seem to grumble about Benchmark margins being low, because they sell direct in the US, and so can’t really sell here for a much higher price or the customers - at least this one - would object.
So the LA4 is installed.
Cables are “make do” and can be perfected over time.
The first thing that strikes my thick ears is improved presence and impact at similar listening volumes as before.
I already have a JL Audio Fathom plugged into the mono output as I run a 2.1 system. This seems to add just the same lower audio spectrum environment.
There are some lesser issues; the smaller case size of the LA4 means the XLRs are very tightly packed on the back panel and my 90degree Neutrik XLRs really are an awkward fit and I will need renew/replace the terminations to suit. Some of the 90degree XLRs are just not going to engage, so think about this if you are purchasing.
Overall I feel that at the price point it is also a suitable/ideal match for the Bartok and ATCs.
Ideally I would have tried the Townshend Allegri Reference but this has not been made available.
Were I running a Vivaldi I might investigate the Townshend further, although I think I am aware that it is not a fully balanced unit in that it runs XLRs but the balanced aspect is broken internally by the circuit design?
Agreed on this — both @PaleRider and I were happiest with our Allegri References using XLR connections. Now I don’t have right-angle connectors, but Neutriks definitely fit…
Yeah, it’s not balanced. Don’t know that I would call it “broken,” but yes it is by design, in order to avoid the use of transformers. One less thing, so to speak. For my use, running XLR ICs was the easy choice, because they were much quieter than the RCA ICs I tried, and even for the stiff Iconoclasts, I had plenty of room both on the back panel itself and behind my cabinet. The Allegri Reference is easily the best outboard volume control I tried. It had less SQ impact then any other, and seemed to preserve the Vivaldi SQ at all ranges of volume.
Erno, I have auditioned the HPA4 preciously, around the same time that I began investigating the Bartok. You won’t hear me say anything bad about the Benchmark, but it did not “grab” me. I found it a bit sterile. I think Benchmark offers exceptional value, as does, for example, PS Audio. But I don’t think either is a reference standard. By the time I decided I needed a volume controller for the Vivaldi stack, I was pretty focused on passive units. The only exception I made was for the Ayre KX-R Twenty, which my dealer enthusiastically recommended, and which I was able to borrow from a friend. While I am glad I tried it out, it confirmed for me that I did not want another amplification stage in my chain.
Recently, two Stereophile writers have been discussing a listening comparison of two excellent power amplifiers. The two agreed on their perceptions of the audible difference, but not on its likely basis. One suggested that it could be due to one amp doing something to reveal more low-level recorded detail. The other, who heard the same difference, insisted it is due to the other amp removing something. In the absence of any objective reference or evidence, we can only regard these as expressions of philosophical differences. However, with the LA4, I had an objective reference.
By physically connecting the input XLR cables directly to the output XLR cables, I could compare the sound of the LA4 at unity gain to that of a bypass with the DACs connected directly to the power amps—ie, it was the LA4 vs nada. I failed to hear any change in balance, tonality, dynamics, details, or soundstage. The LA4 seemed to neither add nor subtract anything. On the other hand, compared to the other preamps on hand, the LA4 was consistently quieter, more open, and more revealing of detail.
Indeed they do. I’m not quite sure what the point of this discussion is. You asked for my assessment, and I provided it. Apparently, you disagree with it, and you cited “higher authority” (Stereophile ) to back your perspective. That’s fine, but it has nothing to do with my assessment, which was candidly provided (and based on my own listening, not a reviewer’s). None of this changes the fact that I did not want to add an active gain stage. One can find ardent supporters of almost any piece of kit. As I have said many times in this forum, I would never tell another human how to spend their money. If you love the Benchmark, great! Go for it! What does that have to do with my selection of passive pre components?
Both myself and a fellow forum member tried the Benchmark HPA4. I tried it strictly as a headphone amplifier while he tried it as a pre as well. We both came to the same conclusion as quoted above . Then again we both are diehard “Naimees” so many things do not grab us. PRAT and all that - we are ruined for life.
Similar to other conversations in that measurements are not everything. Naim gear does not necessarily measure the best - but don’t try to take our green logo boxes away from us!
I did not mean to say you are wrong, neither that I am right. I said “tastes differ”.
My opinion of the HPA4 as a completely neutral preamp is backed by a Stereophile reviewer, but that still does not mean it is the only possible assessment. You find it a bit sterile, I find it accurate, but still involving. It is for me not an end game preamp. It lacks some back to front dimensionality.
The LA4/ HPA4 is an objective reference standard though. Which you can like, or not.
Erno, you didn’t say anything wrong at all. I apologize for my crankiness; please forgive me. I was getting pretty frustrated with continued quarantine, while I waited for delayed test results following recent travel. But that’s not an excuse. Again, my apologies.
Oh yeah, all good; because I do still travel, I get tested regularly, and all have been negative. I knew my risk was very low [thereby likely adding to the frustration]. I’m not whackadoodle about all this; just reasonably prudent for myself given my age and cancer history [I get my second vaccine shot this Friday], but I do go to great lengths to protect my wife who is very vulnerable and has not yet been vaccinated.
We are all going through these cumbersome times, waiting to get ours and ourselves protected. It is just over when we are all there, together. Good to hear you will get your second shot soon! My wife and I are still waiting, like your wife.
) to back your perspective. That’s fine, but it has nothing to do with my assessment, which was candidly provided (and based on my own listening, not a reviewer’s). None of this changes the fact that I did not want to add an active gain stage. One can find ardent supporters of almost any piece of kit. As I have said many times in this forum, I would never tell another human how to spend their money. If you love the Benchmark, great! Go for it! What does that have to do with my selection of passive pre components?
