mhardy6647
Grand Contributor
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OK...obviously, this amp needs a grounding box: https://www.audiosciencereview.com/...s/how-does-an-audio-grounding-box-work.37758/
OK...obviously, this amp needs a grounding box: https://www.audiosciencereview.com/...s/how-does-an-audio-grounding-box-work.37758/
At the end of the day, the output impedance of a tube amp is relatively high. The thinner wires probably make no significant difference.It's odd that your unit has such small wires (and other issues), here is what mine looks like inside....
The Carver Crimson 275 - which has been deleted from the Carver website - weighed 20 lbs. The Black Magic 25 weighs 44 lbs., which suggests proper, much larger output transformers, appropriate for an EL34 PP amplifier. So no - the tiny transformers in the Crimson 275 are still not suitable for an EL34 PP amplifier, much less a KT120 PP amplifier.The Black Magic 25 has different tubes that the Crimson, so it's not a rebrand. Though I'm sure it has similar teeny tiny output transformers inside those cans. (EDIT: The smaller OTs, which gave away the lies about the 275 spec'd power, are appropriate for the Black Magic 25.)
I am assuming that the Carverland (you refer to) was originally USA.Well, I was thinking maybe things were better in Carverland -- but, maybe, not so much.
I will confess to Schadenfreude. Sorry, Carver fans.
Oh, I dunno... but I am honest enough to admit to deriving somewhat perverse enjoyment from watching certain train wrecks occur.I am assuming that the Carverland (you refer to) was originally USA.
Do you possibly think that those habitants really know the difference between Schadenfreude and shut the front door???
I expected better, too. I almost hope they goofed it up on purpose to get a warm, fuzzy sound. Better that than incompetence.Well, I was thinking maybe things were better in Carverland -- but, maybe, not so much.
I will confess to Schadenfreude. Sorry, Carver fans.
Looks like they have the specs for the 350 and 25 duplicated/mixed up...
350 (mono amp)
Dimensions (H x W x D) 7.2” (183mm) X 12” (305mm) x 14” (355,6mm) x 2
Weight: 44lbs (19.95 kg) per chassis x 2
https://www.bobcarvercorp.com/crimson-raven-features-specs
25 (stereo amp)
Dimensions (H x W x D) 7.2” (183mm) X 12” (305mm) x 14” (355,6mm) x 2
Weight: 44 lbs (19.95 kg) per chassis x 2
https://www.bobcarvercorp.com/black-magic-features-specs
Why 2 for the 25?
Ohms
I wonder, is that 1.7 ohms Source Impedance the output impedance to the speaker?specs for the BM25:
SPECS (my emphasis)
Gain: 29 dB
Power: More than 24 Watts Per Channel, both channels driven at eight ohms with no more than 1% Total Harmonic Distortion. Distortion decreases at lower levels
4Ω Power 25 watts
8Ω Power 25 watts
16Ω Power 25 watts
Noise: Better than 100 dB below 25 watts, A-weighted
Frequency Response: +0, –2 dB from 20 Hz to 20 kHz
Distortion Less than 1%
Source Impedance 1.7 ohms
Input Impedance 100 kΩ
Vacuum Tubes: EL-34 (optional 6550, KT88, KT120) 12AX7, 12AT7
AC Power:
120 Volts, 60 Hz (US)
240 Volts, 50 Hz (EU
Weight 19 lbs / 8.61 kg
Color: Satin Textured Black, Chrome, Natural Aluminum
Country of Origin: USA
Almost certainly.I wonder, is that 1.7 ohms Source Impedance the output impedance to the speaker?
YikesAlmost certainly.
I assume that's the amp's output impedance. If so, then, heck, that'sI wonder, is that 1.7 ohms Source Impedance the output impedance to the speaker?
Your 2A3 anode resistance is probably pretty small compared to an EL34. Maybe if you opt for say, the KT88 output tubes the impedance is a bit lower. Maybe...I assume that's the amp's output impedance. If so, then, heck, that'slower(EDIT) higher than that of my zero NFB single-ended 2A3 amp (with output impedance of a hair less than an ohm)!
That would actually be a pretty remarkable engineering achievement* on the part of Dr. Carver!
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* engineering achievement, of course, being a vector quantity. I.e., the Gothic Cathedral at Beauvais (which collapsed several times during construction and ended up being more or less an outrageously glorified chapel, see Hartt's History of Art, vol. 1) and the "Galloping Gertie" bridge over the Tacoma Narrows were remarkable engineering achievements (just not in a good way).
Yeah, but I don't want no steenkin' tetrodes, kinkless or otherwise. (Power) triodes FTW!Your 2A3 anode resistance is probably pretty small compared to an EL34. Maybe if you opt for say, the KT88 output tubes the impedance is a bit lower. Maybe...
If I just had to use tubes, push-pull triodes would be it. Luckily though they made those scratchy old silicon carbide JFETs.Yeah, but I don't want no steenkin' tetrodes, kinkless or otherwise. (Power) triodes FTW!