Recent Posts

1

Kaiju Stereo 300B amp / Re: Adding more speaker binding posts and wiring for more than 1 speaker ohm out?

« Last post by currly30 on Today at 09:24:00 AM »

Would doing a 4, 4P4T on-off, switches set up also result in a loss of performance? Or would having the outputs for the other ohms off be enough to not result in a performance loss?

2

General Discussion / Re: question about HT-input

« Last post by Paul Birkeland on Today at 04:53:51 AM »

That's only something the manufacturer can answer.  Typically I would expect the switch mentioned to move where the signal enters the circuit to a later node, so it's certainly possible that the input impedance in that position may be different than the line input impedance, but there isn't much data given. 

3

Stereomour II / Re: Another failed voltage check

« Last post by SamJ on Today at 01:48:33 AM »

Ok, fair enough.  I'll revist the board and report back. 

4

General Discussion / Re: question about HT-input

« Last post by Ingber on Yesterday at 11:27:28 PM »

Hi Paul,

Thanks for the reply.

The normal input impedance of the M6i is said to be 38 kOhm. Will the HT-bypass (bypassing the volume control) not affect this?

My simplistic view of an integrated amp like the M6i is that it is a pre-amp and power amp together in one box. Assuming that the build in pre-amp has both a volume control and a gain stage, it is not clear to me from the M6i manual if also this gain stage is bypassed in the HT mode. If it is not, will connecting a separate pre-amp to the HT-input not result in too much gain and therefore clipping? I guess I can easily check this myself: see if switching to HT-bypass results in lower speaker sound output.

Regards,

Ingber

5

Moreplay / Re: Moreplay Upgrade - Upgrades Caps Resistors?

« Last post by RedBaron on Yesterday at 05:25:44 PM »

I just finished assembling my Moreplay kit. I am quite pleased with the sound so far but I am always curious about possible upgrades. Currently, I am waiting for my Kenrad 6V6GT NOS tubes to arrive. I am not sure whether it will improve anything.

Could anyone describe what sound quality improvements they think they got out of the upgrades described above?

As an FYI, I am running the Moreplay through 2 stock Nelson Pass ACAs bridged monoblocks and modded Klipsch Forte II speakers. I am considering using 2 Dynaco Mark IV to replace my Nelson Pass. Maybe there is no point upgrading yet given my system?

Any feedback appreciated, I am new to this whole kit/Bottlehead community  🙂

6

General Discussion / Re: question about HT-input

« Last post by Paul Birkeland on Yesterday at 03:18:13 PM »

From the M6i manual:

To use the AUX/HT input as a HT input, move the AUX/HT switch to the HT position. This input is now
unaffected by the volume control, allowing volume control on an external Home Theatre processor to be used
directly. Connect Home theatre or other source outputs to the AUX input RCA sockets (see page 7). Select
AUX input by pressing the AUX button so AUX LED is lit.
IMPORTANT: Take great care when using the input in HT mode. Ensure that the volume control is turned right
down on the HT processor when first setting up. The HT mode is designed for sources which require their own
volume control to be used. Connecting sources in HT mode with no volume control could result in damage to
hearing and/or speakers due to uncontrolled loud sounds.


I did also double check the input impedance, and it's adequately high so this should work fine. 

7

Stereomour II / Re: Another failed voltage check

« Last post by Paul Birkeland on Yesterday at 03:15:27 PM »

I can see on your PC board that you haven't heated the joints well enough, as the solder hasn't sunk into the board into the through holes.  Please reheat the MJE5731A joints, especially the center one.  Hold the iron on the joint for a good long 10 seconds to be sure the solder flows into it. 

Definitely do not shotgun random parts at something like this, as you can make new problems.

8

Stereomour II / Re: Another failed voltage check

« Last post by SamJ on Yesterday at 11:01:53 AM »

PB,

Replaced the LEDs, and the MJE5731A on the right channel just to be sure.  All 4 LEDs now illuminate, both 12AT7s, but 14 is still reading high (349vs the previous 391).  I checked the MJE5731 joints, they're little silver mounds on both sides. 

9

General Discussion / question about HT-input

« Last post by Ingber on Yesterday at 07:02:44 AM »

Hi,

I was considering to build the Bottlehead Moreplay pre-amplifier. I currently own a Musical Fidelity M6i integrated solid state amplifier. It has a Home Theater RCA input (HT-input) that allows to "bypass the volume control". Am I correct to assume that I can connect the output of a pre-amplifier to this HT-input, thus using the M6i as my power amp?

Best regards,

Ingber

10

General Discussion / Re: IMPORTANT: Potential Part Issue

« Last post by Jameson on Yesterday at 02:10:52 AM »

An update here.

We reached out to people who purchased affected kits and posted here last night in an abundance of caution, but we did hear back from Dan and Eileen last night that this issue was caught in January and the kit in question hadn’t been opened yet. This means the likelihood of you having the issue we raised is pretty low.

I do encourage you to pay attention to part values prior to installation. We do our best, just as Dan and Eileen did, to ensure you get the right parts but mistakes do happen from time to time.

As always, reach out to us here or at info (at) bottlehead.com if you need anything.