Grado Red1

Testing display piece - opened box 

The newly redesigned Blue1 and Red1 have had their coil design reconfigured, and the effective moving mass of their generating system has been reduced by 17%. The Blue1 and Red1 models use a four piece OTL cantilever technology, standard oxygen free wire in the coils and Grado's specially designed elliptical diamond mounted on a brass bushing. The Red1 model is selected from the Blue1 production run and meets higher test specifications. Approximately 10% of the production run will meet these standards and become Red1 models.

Hand made in USA Brooklyn N.Y.  - original product boxed 

We offer short term rent of this product for your testing at home . More info here

Specification:

Frequency Response: 10-55 
Principal: MI 
Channel Separation at 1KHz: 30 
Input Load: 47K 
Output at 1KHz 5CM/sec.: 5mV 
Recommended Tracking Force: 1.5 
Stylus Type: E 
Inductance: 45mH 
Resistance: 475 
Compliance CUs: 20 
Stylus Replacement: U 
Mounting: S/P 
Weight: 5.5