Recent Posts

71

Crack / Speedball 1.1 PDF [resolved]

« Last post by bingobango on March 21, 2025, 09:46:35 AM »

I've placed an order on March 11th, and in anticipation of the Crack and Speedball arriving I've wanted to download and review the manuals. I was able to download the Crack 1.1 Manual PDF, however the Speedball 1.1 Manual PDF says I've reached my download limit. The issue is that I wasn't able to download or even access the PDF. I have clicked the link in my email which may have expired my token, but I'm still needing the PDF.

Any assistance would be appreciated!

72

Moreplay / Re: Schiit Gjallarhorn

« Last post by Dhouse7516 on March 21, 2025, 07:06:15 AM »

Thanks, Paul.

73

Moreplay / Re: Schiit Gjallarhorn

« Last post by Paul Birkeland on March 21, 2025, 04:49:45 AM »

It's a little bit on the low side in terms of input impedance, but not too far off. 

74

Moreplay / Schiit Gjallarhorn

« Last post by Dhouse7516 on March 20, 2025, 05:27:00 PM »

Good evening, folks.

I have a line on a Schiit Gjallarhorn amp that I'm considering using in a desktop setup with a pair of DA Wave MT speakers (4-ohm, 86db sensitivity, currently being driven by a SEX). I've worked through the numbers, and I think that the Moreplay should theoretically  play well with the Gjallarhorn in this setup. The Gjallarhorn is a Class AB amp with an SE input impedance of 20K ohms according to Schiit. I'm prepared to roll the dice and give this combination a shot, but am hoping for a gut-check from this group before I pull the trigger. Please let me know if anyone sees a compatibility issue that I might be missing. (If so, I might just finally build a Class A Pass amp for my desktop setup!)

Thanks much!

75

Stereomour / Re: Tube biasing for the older Stereomour

« Last post by Pkay on March 19, 2025, 08:02:44 PM »

I had the pleasure of setting the amp up today and even with speakers which are a mis-match is sounded great.  I was using some Kudos Cardea C20 which are as follows;

pecifications:
Type: 2-way, bass reflex

Recommended amplifier power: 25-200W

Sensitivity: 88dB

Impedance: 8ohm

Frequency response: 30Hz – 30kHz AIRR (average in-room response)

Tweeter: SEAS (Kudos Crescendo K2 spec) 29mm fabric dome

Midbass: Kudos 180mm unit with cast chassis, coated paper cone and 26mm voice coil

76

Moreplay / Re: 2 Questions: Attenuators and Remote Volume Control

« Last post by Rockyhill on March 19, 2025, 01:50:08 PM »

Thanks Paul. The mod looks straightforward.

77

Moreplay / Re: 2 Questions: Attenuators and Remote Volume Control

« Last post by Paul Birkeland on March 19, 2025, 12:45:02 PM »

The ST-35 isn't super-duper sensitive, but it could be a problem if you have sensitive speakers or a really hot source feeding the Moreplay. 

You could perform the mod on Crack FAQ #3 (see the photo on the post) https://forum.bottlehead.com/index.php?topic=4295.0  I'd use 10K resistors where the 75K ones are in the Crack mod and 1K resistors where the 33K ones are.  This should pull a lot more range for you relative to the inline attenuators.  Just be sure you put these on the 10K volume pot, not the balance pot.

The P4 is a solid state preamp and more of a standalone unit.  It is definitely possible to add a remote to a Moreplay (I am constructing one right now actually), but it generally works a lot better with a different chassis.

78

Moreplay / 2 Questions: Attenuators and Remote Volume Control

« Last post by Rockyhill on March 19, 2025, 11:57:04 AM »

I'm using my Moreplay with a Dynakit ST-35. Volume control has a limited range, so based on other threads here I have installed 10 dB Rothwell attenuators at the input to the amp. That has increased the volume pot range a little but less than I was expecting. What other options do I have to give me better volume range?

This leads to the remote control question. Without performing surgery on the Moreplay what can be used to implement remote volume? Is adding another pre upstream (that has remote capability) out of the question? I've been reading about the Fosi Audio P4 on ASR and thought "what if this was added to the signal path?" Would this introduce impedance issues?

Does the Moreplay upgrade address this gain matter at all?

Thanks

79

Stereomour / Re: Tube biasing for the older Stereomour

« Last post by Paul Joppa on March 19, 2025, 03:39:18 AM »

The older Stereomour uses fixed bias - the only adjustments are the two hum balance controls. Center them approximately to start, then adjust each channel for minimum hum.

Manuals are available, which include instructions for voltage checks  to confirm correct operation. If you post a few photos, we can identify the version more precisely so you get the right manual. Since many customers make modifications, we can also identify whether changes have been made, at least in most cases.

80

Stereomour / Tube biasing for the older Stereomour

« Last post by Pkay on March 18, 2025, 07:47:03 PM »

Apologies for the very basis question but I recently received an old version without any instructions or manual.

I was wondering how do I bias the tubes? How loudly do I set the volume initially to turn the dial for the individual tubes?

Is there any must know information before I start?

Thanks for answering my basic questions.