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Soundlumia
2x Lorenz PCC88 7DJ8 Pre-SEL White Round Logo - Stuttgart '50s - Same Code 1813
2x Lorenz PCC88 7DJ8 Pre-SEL White Round Logo - Stuttgart '50s - Same Code 1813
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$307.50 USD
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Soundlumia's Opinion
These must be the most exotic European audio tubes! So elusive they're even unheard of in many parts of the world. Not many of these tubes are around, either, let alone a strong pair! Although lesser known than big names like Telefunken and Siemens, the Lorenz tubes are just as remarkable as any other German-made tubes and have been the go-to tubes for guitar amplifier users.
Like most German tubes, they are characterized by an impressive open "air" at the top end, and the sound stage is super wide, even in mono applications such as vintage classical vinyl records from the early '50s, these tubes provides you with a full 3-D imaging. The mid-range is ruler flat, a.k.a. natural sound, and the bass is tight and accurate. One very unique feature of Lorenz tubes is the fine sense of dynamics you get from anything you play - it feels you are enveloped by an invisible "musical body" that you can't escape from the sheer cerebral joy. Last but certainly not the least, as the legend goes for all the German tubes, these are astonishingly quiet. If you're seeking European tubes with ultra low noise look no further. These will get the job done fantastically.
Like most German tubes, they are characterized by an impressive open "air" at the top end, and the sound stage is super wide, even in mono applications such as vintage classical vinyl records from the early '50s, these tubes provides you with a full 3-D imaging. The mid-range is ruler flat, a.k.a. natural sound, and the bass is tight and accurate. One very unique feature of Lorenz tubes is the fine sense of dynamics you get from anything you play - it feels you are enveloped by an invisible "musical body" that you can't escape from the sheer cerebral joy. Last but certainly not the least, as the legend goes for all the German tubes, these are astonishingly quiet. If you're seeking European tubes with ultra low noise look no further. These will get the job done fantastically.
Professional Tube Testing
This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:
Tube 1:
Measured transconductance(GM): 12.65/12.55 mA/V - 101%/100% (100% = 12.5 mA/V)
Measured plate current(IA): 16.087/17.347 mA - 107%/116% (100% = 15 mA)
Tube 2:
Measured transconductance(GM): 11.21/8.96 mA/V - 90%/72% (100% = 12.5 mA/V)
Measured plate current(IA): 13.11/10.342 mA - 87%/69% (100% = 15 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
Appearance & Cosmetic condition
Silkscreen: 90% - 95% (Pristine)
Date code(s): 1813 (same on both tubes)
Packaging
New white tube boxes.
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