[L0rdGwyn]

Are KT170 tubes compatible with Aegis ?

I talked about them a bit in this post:

https://www.head-fi.org/threads/zmf-aegis-official-thread.972476/post-18129732

Long story short, they should work but the scales for the curves in the datasheet are so large it's difficult for me to say whether or not they will bias correctly. If someone has a pair and wants to send them to me for testing, I'm more than happy to do that.

 

[Wes S]

I think it just depends on how they operate in your local area. I've had very few problems with them. I often will redirect a package to a local FedEx pickup location so I don't have to worry about missing them at home.

Ditto.

 

[K3cT]

Had the pleasure to tried the one and only Aegis yesterday, this amplifier catch my attention for so long but until yesterday i haven't meet one in real life

Sound is somehow like what i expect from reading the impressions. Very fluid, open and expansive sounding, and has great balance all across the frequency. Aegis got that effortless and very organic sound but still has solid bass kick and treble bite. Great synergy with Caldera Open and Atrium Open/Closed( forgot to try it with Verite )

We also tried changing some tubes on Aegis last night but in the end i still prefer the tonal balance of stock tubes ( maybe @K3cT can remind me what tubes are used yesterday for rolling )

KR 5U4G rectifier, stock JJ driver, Cayin branded KT88 (I suspect made by Psvane) and stock JJ EL34 power.

With stock tubes the Aegis sounded very good already. I think if I were to roll tubes I will try to aim for more texture / resolution and thicker sound because I feel these two areas are where it can be improved.

 

[L0rdGwyn]

With stock tubes the Aegis sounded very good already. I think if I were to roll tubes I will try to aim for more texture / resolution and thicker sound because I feel these two areas are where it can be improved.

To that end you might like NOS Tung-Sol 6550.

 

[AnyDave]

To that end you might like NOS Tung-Sol 6550.

How do you like the 6550s compared to your EL37s? I have both, but am curious about your opinion.