You should be able to use 71A/12A/01A interchangeably. All come in Globe and ST shape. As I recall, there were over 400 different brands of 01A alone. It’s a huge rabbit hole…

My new Kleen-Sweep is in the house, it's pretty awesome. Thought I'd share a few pix.

How Sweet it is! :)

Congrats! I love it when amps use unusual tubes, bet it sounds amazing!

It does sound pretty amazing, quiet as a mouse. I'm using some temporary speakers that are 82 dB efficient (Pioneer SP-BS21-LR) and they sound better than ever. I will be getting my Omega Super 7 Monitor MK2 speakers next week and they are single driver and 94.5 dB at 8 ohms - I expect pairing them together will have great synergy for my daily listening at low volumes.

Why is Song Key Important for a Musician?
 

The key song has significant importance, especially to someone who is learning about harmonic mixing, remixing, classical music, or DJing.

The phono stage has arrived.
Great device, now what belongs together plays together.
LP2030, 300b-DH, PH-1A SET

The first impression after connecting is very good.
For a phono stage with 43db gain it is very quiet.
Very little noise and a small buzz from the speaker
when the volume knob on the PRE is fully turned up.
My transistor wasn't quieter either.

The first thing you notice is a great vocal range. Very good resolution in the treble range. The bass could be a little tighter and faster but is miles away from thickened and slow.

But the device has only been in operation for 15 minutes and I have several 6SL7, ECC83 and 5Y3 to change tubes and various silver cables I also have. I think there will be a lot of changes in terms of sound.

Now a red wine and a little Leonard Cohen.

Leave the phono stage on until Sunday, and will certainly be pleasantly surprised what happens until then in terms of sound.

The first impression is very positive. the device has the same class as the other devices from Dennis and deserves a place in Olympus.

https://live.staticflickr.com/65535/...a2493425_z.jpgIMG_20230210_171702 by cgn- dt-n, auf Flickr

https://live.staticflickr.com/65535/...f9f52687_z.jpgIMG_20230210_172812 by cgn- dt-n, auf Flickr

An all Had setup, sweet! Plus the color coordination is on point too. Was that the real reason for buying the amps? Lol.

What’s the significance of the 300-v designated as DJH OR DH?

Midlife Crisis red is a beautiful color and fits my age, my car and the speakers. but joking aside, I actually wanted something in chrome, but I didn't like the sound tuning of Jadis at all. Symphonic Line has a tube pre, very good, but also very expensive. I was a customer of the former Cary Audio distributor 30 years ago and so the circle closed to the products of Inspire. The best choice I have ever made!!!

The correct name of the power amplifier is 300b DJH, forgot a letter, can happen at my age.

It has 2 driver tubes 6SL7, larger output transformers than the 300b-V and no volume regulator.

Where exactly the differences are I do not know, because I have no idea about the technology, but only good ears and I know what I like or not.

I am curious to see what the phono stage reacts more, to different 6SL7, the exchange of various 12AX7 / ECC83 or to the rectifier.

I would have to look in the basement, there should still be an old little Grado MI a Rega MM and an Ortofon MC of the entry-level class. But actually I like my Benz Glider HO which has served me very well over the years. An alternative could be a new Ortofon Cadenza Blue with the transformer or a Grado Timbre Master 3. But who knows what the near future will bring.

I will first deal with the set up as it is now to get the sound the way I like it. This will take some time and many attempts with tubes.