I ordered a pair each of the T34A-4 and the T34-B from Solen last week and received them this week.
None of them passed incoming QC and quick checks. All four have rubbing voice coils and relatively high distortion- this is quickly noticed by ear on the first sine chirp sweep. Test level is 3V P-P.
I expect that in order to get the high reported sensitivity they may have a very minimal VC gap dimensions. This may be problematic in manufacturing. A number of other tweeters were checked at the same time, including relatively budget parts like the Peerless DA25TX00-08. No other tweeters exhibited any problems or unusual behavior on the exact same test setup.
This will be followed up on and investigated with Solen today.
None of them passed incoming QC and quick checks. All four have rubbing voice coils and relatively high distortion- this is quickly noticed by ear on the first sine chirp sweep. Test level is 3V P-P.
I expect that in order to get the high reported sensitivity they may have a very minimal VC gap dimensions. This may be problematic in manufacturing. A number of other tweeters were checked at the same time, including relatively budget parts like the Peerless DA25TX00-08. No other tweeters exhibited any problems or unusual behavior on the exact same test setup.
This will be followed up on and investigated with Solen today.
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