Mullard M8080/CV4058 (Premium 6C4)
The most common places we find the M8080/CV4058 tubes is in the wonderful preamps by Conrad Johnson. Their PV-14 and PV-15 series, as well as the ET2 all use this tube. They are also a suitable upgrade for any 6C4 circuit such as vintage Eico tuners, McIntosh receivers, etc.
Note: Some stock is packaged in blue Mullard boxes and some is packaged in JAN/military white boxes. Regardless, the tubes have identical construction.
6C4 Tube Types Other Mullard tubes
Warranty Information and Return PolicyWarranty Period: 3 months
All our tubes are guaranteed for 3 months from the date of purchase. (Any exceptions will be noted on that tube's Warranty tab)
If you receive a tube that does not perform to the manufacturer's specifications, please do the following:
- contact us to get a return authorization
- return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.
Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.
We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.
These guidelines may be updated without notice.
Ratings & Reviews
The NOS Mullards
by RJ -
G'day from down unda! Placed an order for these special Mullards and they arrived in great timing. It's been around 20hrs of play time since Mon and sounds superb! Just the way Conrad Johnson intended their amplifiers to sound.
I'm using these tubes as the input stage on the LP125M monoblocks, partnered with a CT5 preamp, driving Martin Logan CLX Art's.
Every aspect of what is required is there, nothing short whatsoever! Tremendous depth in soundstage, mid-range warmth and that sheer musicality that CJ is known for. The overall presentation of balance on these Mullards are SOTA. The other main thing worth noting is the extreme quietness, no hiss, sputter, glare... Nothing. Ordered them in pairs and these guys have done an outstanding job in matching the tubes as closely as possible. Great stuff! Looks like I found a new tube supplier!
Cheers to tubes and enjoy the wonderful soul they deliver, best RJ