11
Kaiju Stereo 300B amp / Re: Kaiju/ Beepre2 Equalizer
« Last post by blackharp on May 08, 2025, 10:29:29 AM »Thanks, Doc. I'll double check how I wired the amp. These are my only 16 ohm speakers and I like to switch them out occasionally.
Recent Posts
12
Kaiju Stereo 300B amp / Re: Kaiju/ Beepre2 Equalizer
« Last post by Doc B. on May 08, 2025, 08:44:16 AM »604-D is nominally 16 ohms. If that is the case with yours, using the 16 ohm output configuration of the Kaiji OTs should give a slightly fuller bodied sound.
13
Kaiju Stereo 300B amp / Re: Kaiju/ Beepre2 Equalizer
« Last post by blackharp on May 08, 2025, 08:35:04 AM »604-Ds and I believe 8 ohm, but I can't remember 100%.
14
Moreplay Upgrade / Re: Slightly high B+ Voltage?
« Last post by Paul Birkeland on May 08, 2025, 07:52:14 AM »Not a problem, your line voltage is just a bit high.
15
Kaiju Stereo 300B amp / Re: Kaiju/ Beepre2 Equalizer
« Last post by Paul Birkeland on May 08, 2025, 07:51:29 AM »Which Altecs do you have and what impedance configuration are you using on the output transformers?
16
Kaiju Stereo 300B amp / Kaiju/ Beepre2 Equalizer
« Last post by blackharp on May 08, 2025, 06:21:11 AM »Is there any way to integrate an equalizer, tone controls or similar into the circuit? If not, is there a cost effective hardware solution? I seem to be missing a bit of lower midrange and/ or fullness I get out of my Fisher and McIntosh amps on certain music. Jazz horns sound great connected to my Altecs. I know this is sacrilege to some. 
Thank you all in advance and as a side note, I just missed another crack sale.
Thank you all in advance and as a side note, I just missed another crack sale.
17
Moreplay Upgrade / Slightly high B+ Voltage?
« Last post by hmbscott on May 07, 2025, 03:23:28 PM »Just completed my Moreplay Upgrade Kit install and have a slightly high B+ VDC value. I noticed it was rising with time initially but nearly stabilized after 10 minutes.
All voltages measured at 10 minutes after powering on except as noted:
My line voltage: 127.5 VAC
All LED's noted ON
"A" socket heater voltage: 6.28 VDC (measured on PCB at h2 + & -)
"B" socket heater voltage: 6.25 VDC (measured on PCB at h1 + & -)
Terminal 6: 135.9 VDC
Terminal 16: 138.7 VDC
B+ on PCB: 187.4 VDC
B+ with time
Minutes Volts
0 min 181.1VDC
2 185.4
4 186.7
6 187.2
8 187.4
10 187.5
I noted that the heater voltages were very stable between T=0 and 10 min.
Terminals 6 and 16 increased a few volts between T=0 and 10 min.
I'm assuming this is OK, but I thought I would run it past you.
All voltages measured at 10 minutes after powering on except as noted:
My line voltage: 127.5 VAC
All LED's noted ON
"A" socket heater voltage: 6.28 VDC (measured on PCB at h2 + & -)
"B" socket heater voltage: 6.25 VDC (measured on PCB at h1 + & -)
Terminal 6: 135.9 VDC
Terminal 16: 138.7 VDC
B+ on PCB: 187.4 VDC
B+ with time
Minutes Volts
0 min 181.1VDC
2 185.4
4 186.7
6 187.2
8 187.4
10 187.5
I noted that the heater voltages were very stable between T=0 and 10 min.
Terminals 6 and 16 increased a few volts between T=0 and 10 min.
I'm assuming this is OK, but I thought I would run it past you.
18
Kaiju Stereo 300B amp / Re: Kaiju ground locations
« Last post by Dzrout on May 05, 2025, 08:44:44 AM »Thank by you sir!
19
Mainline / Re: Mainline ten years in
« Last post by Doc B. on May 05, 2025, 08:34:23 AM »I think the failure rate was actually a bit less than that. That studio amp had a rather flexible bottom cover, and at least once the failure was due to the bottom getting pushed in against the bottom of the biasing PC board. I remember it clearly because the repair was done in a big hurry in a hotel room at CES sometime in the 2000s. It shorted it out a second time when I set the case on an ottoman whose cushion pushed on the bottom and thus I got to do the repair twice and added a layer of insulating tape at the contact point. Luckily back in those days I brought a rolling tool case full of tools and spare parts to shows. In contrast the last Mainline I had went out on loan often and did many demos without ever breaking.
20
Moreplay Upgrade / Re: A few more kits available
« Last post by Love Rhino on May 04, 2025, 03:04:26 PM »I was able to sneak into this drop as well, which makes me happy as I missed the last couple. Shipping was super fast, thank you!