BHK 250 tweaks

magister said I am still running the original tubes in my pre. I will try dampers on them before I switch over to the Tungsrams that I have waiting. Stay tuned .
Putting Herbie's Audio Lab dampers on the stock preamp tubes made a slight improvement, nowhere near as noticeable as adding them to the Tungsrams in the BHK 250. I will run this setup for another week or so, then try the Tungsrams that I have available for the pre.

MMM… will have to look into these Herbie dampers.

Anyone compared or tried the EAT ones?

Placing my amp onto a Finite Elemente stand was a noticeable and worthwhile improvement too, I found.

pichi said I have installed the Tungsram into my 250 amp and Radio Technique 1958/59 12au7 in the pre, absolutely delighted!
I am using the ALO Audio Green Line power cable. It is a good match.
longbowbbs said
pichi said I have installed the Tungsram into my 250 amp and Radio Technique 1958/59 12au7 in the pre, absolutely delighted!

I am using the ALO Audio Green Line power cable. It is a good match.


It’s great to be able to attain further satisfaction isn’t it!

Tweeks make the hobby go round…

Mark A. Larsen said
mtseymour57 said I ordered the BHK 250 after reading about its development and the reviews from the beta testers. I was a little anxious because my Pass X250.5 has served me well for a long time. After several days of break-in, I was relieved that the BHK 250 met my expectations, and was offered better resolution, bass and treble extension.

Out of curiosity, I decided to bypass the stock footers with the AmCan version. AmCan Audio is a small company that makes very effective isolation footers. Previously, I used a full complement of Stillpoints Ultra SS footers under my VPI Classic 3 table, Direcstream DAC, Pass amps, and Revel Studio2 speakers. The AmCan footers were better and less expensive so I quickly sold all my Stillpoints. Other AmCan users even prefer them to the Ultra 5 footers.

Rather than removing the stock feet, I just placed the large AmCan footers evenly under the BHK. The bass was noticeably tighter and stronger, and the lower noise floor made it easier to hear subtle details. The BHK just sound significantly better. I suspect that any good footers will generate similar improvements. Has anyone else tried this tweak?

I’ve also had good experience using Synergistic Red fuses in my Directstream DAC and amps. Since the BHK has 6 fuses (2 main + 4 rails), has anyone tried upgrading the fuses? Which fuse is the best candidate? It’s expensive to upgrade all six fuses!

On your recommendation, I installed three Copper AmCan footers under each of my BHK 300s and experienced the same results.


Cool! Glad that I’m not imagining things

mtseymour57,

I just ordered 2 SR Black fuses today. Like you said, I think it’s so expensive to replace all 6 fuses. I will do the main ones first and will report back here. I might get the red ones for the other 4 fuses just to save money.

a25105 said mtseymour57,

I just ordered 2 SR Black fuses today. Like you said, I think it’s so expensive to replace all 6 fuses. I will do the main ones first and will report back here. I might get the red ones for the other 4 fuses just to save money.


Did the SR Black mains fuses improve the sound?

They blew me away, it like night and day experience compare to stock fuses (NOT EXAGGERATING) . It’s exactly what Oregonpapa said from the post below. Can’t wait till they are completely break in.

https://forum.audiogon.com/discussions/synergistic-red-fuse?page=7

a25105 said They blew me away
Then you need a slow-blow one

Has anyone used Solid Tech stands as an amplifier stand? Wonder if it would be much better than the wooden block/wheelbarrow inner tube setup I’m currently using?

frank7036 said Has anyone used Solid Tech stands as an amplifier stand? Wonder if it would be much better than the wooden block/wheelbarrow inner tube setup I'm currently using?
You mean like these? One of our members owns these I think. I considered buying them, and asked about his experiences, but never heard back. Because I was looking to maximize the space for my headphone listening station, and these are somewhat inflexible in their sizing [1 unit wide was not wide enough, and 2 units wide was too wide], I ended up commissioning a custom build from Mapleshade. It actually is costing me less than an equivalent set of ST racks. Mapleshade also makes platforms that can be used as, er, stand-alone stands. They're very reasonable in price and, in standard finish, returnable. [I have no affiliation with Mapleshade other than being a happy customer.]

In my living room, my cabinet does not afford enough room to put the Powerbase under my BHK 300s. The SAF is a big factor in the living room; wait, no, it really is the factor. So, we have a very nice cabinet made of cherry, with a rosewood finish that matches the speakers. The addition of the height of the 300 amps and P10 power units has used up most of my space for vibration control. So, I will probably put the Stillpoints back under most of the pieces in that cabinet. They have the benefit of being less than half as tall as the Powerbase, and being much less obtrusive. Since I don’t really need the electrical side of the PB anyway, it works out.

@adminpaul or anyone else, are the thread sizes of the footers on the PS Audio equipment available perhaps as a chart? I hate that ā€œfloatieā€ look when you put Stillpoints or something similar under a piece of equipment, while the OEM footers are left attached. I have a situation in my speaker system rig, where the BHKs and P10s have used up the cabinet shelf height that was available for vibration control, so out go the PowerBases, and in goes something shorter like the Stillpoints or AmCan. I would like to make sure I get the right threads for the footers so I can locate them in the OEM spots. Just like that look better.

The screw threads on the DS, BHK Preamps, and DMP are quite small for example. I have not tried to remove the P10 or 300 footers [@lonson suggests it is not trivial], but I would expect those threads to be more robust. Any specs available?

A chart for all the various PSA components would be convenient. The info should also go in the manual for each component, on the specs page. (And those that, like the DMP, don’t have a specs page should!)

palerider said @adminpaul or anyone else, are the thread sizes of the footers on the PS Audio equipment available perhaps as a chart? I hate that "floatie" look when you put Stillpoints or something similar under a piece of equipment, while the OEM footers are left attached. I have a situation in my speaker system rig, where the BHKs and P10s have used up the cabinet shelf height that was available for vibration control, so out go the PowerBases, and in goes something shorter like the Stillpoints or AmCan. I would like to make sure I get the right threads for the footers so I can locate them in the OEM spots. Just like that look better.

The screw threads on the DS, BHK Preamps, and DMP are quite small for example. I have not tried to remove the P10 or 300 footers [@lonson suggests it is not trivial], but I would expect those threads to be more robust. Any specs available?


Boy I don’t have a clue. I’ll ask around. Our mechanical engineer just went on a three week cruise (lucky dog) and he’d be the one I’d ask. I’ll check with others for you.

palerider said

You mean like these?

@palerider I was actually thinking of the ST Reference as opposed to the Regular or Hybrid - but any of them really. I like the idea of suspending / isolating items from vibration. Like you, I’ve now decided on custom made (weight specific) platforms from a local source and at the moment I’m lucky that I have an ā€˜audio space’ that I can indulge myself in.

Paul McGowan said
palerider said @adminpaul or anyone else, are the thread sizes of the footers on the PS Audio equipment available perhaps as a chart? I hate that "floatie" look when you put Stillpoints or something similar under a piece of equipment, while the OEM footers are left attached. I have a situation in my speaker system rig, where the BHKs and P10s have used up the cabinet shelf height that was available for vibration control, so out go the PowerBases, and in goes something shorter like the Stillpoints or AmCan. I would like to make sure I get the right threads for the footers so I can locate them in the OEM spots. Just like that look better.

The screw threads on the DS, BHK Preamps, and DMP are quite small for example. I have not tried to remove the P10 or 300 footers [@lonson suggests it is not trivial], but I would expect those threads to be more robust. Any specs available?

Boy I don’t have a clue. I’ll ask around. Our mechanical engineer just went on a three week cruise (lucky dog) and he’d be the one I’d ask. I’ll check with others for you.


Hey Paul, any info to be had here?

Hope this is the right place for this question. I have a dedicated 240 volt line to my listing room not in use. Would there be any benefit to get a BHK 240 v amp rather than 120v amp for the room? I have PWT, PWD MK 2, Audio Horizons pre,Mark Levinson 432 ss,Dynaudio Confidence 5 speakers with old Transparent RXL speaker wires. Thanks. O also P10 for power. Also ultimate PS ultimate outlet 240v.

brent

I would power a 120V BHK with the 120V P10 over even a dedicated isolated ground 240V line.

1 Like
brent said Hope this is the right place for this question. I have a dedicated 240 volt line to my listing room not in use. Would there be any benefit to get a BHK 240 v amp rather than 120v amp for the room? I have PWT, PWD MK 2, Audio Horizons pre,Mark Levinson 432 ss,Dynaudio Confidence 5 speakers with old Transparent RXL speaker wires. Thanks. O also P10 for power. Also ultimate PS ultimate outlet 240v.

brent


Not to my knowledge. Other than the balanced power aspect of the 240 line there would be little benefit - also, we don’t sell 240 volt version here in the States.

But even if we did, I don’t think you’d hear a difference.