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Playback Frequency Responses using STL Test Tape

Notes

Pictures are taken from CoolEdit 2000 screen, top trace is L CH, bottom trace - R CH
Test Tape used - STL (Standard Tape Laboratory) Reproduce Alignment Test Tape 1981 IEC 3180-120us Compensated*
The level of the frequency response section of STL tape is -20 dB re. 160 nWb/m DIN
Absolute level depends on an output voltage of a particular deck.
Irregularities in HF area (16-18 kHz) caused mostly by PB head wear.
An apparent rise and a channel imbalance in the LF area below 100 Hz is caused by the use of a full track test recording tape.
On all decks the PB head azimuth was aligned before the test (by a minimum phase shift between channels at 12.5 kHz using the same STL test tape).

AIWA_ADF700	AIWA_ADF850	AIWA_ADF910	AIWA_AWX999	AIWA_XK007	AIWA_XKS7000
Akai_CS_M02	Akai_GX6	Harman_Kardon_TD392	HitachiD909	Hitachi_DE95	JVC_KDA77
Marantz_SD60	Nakamichi_582Z	Nakamichi_BX300E	Nakamichi_Cassette_Deck_1.5	Nakamichi_Cassette_Deck_1	Nakamichi_DR2
Revox_B215	SONY_TCK81	SONY_TCK555	SONY_TCK555ESII	SONY_TCK677ES	SONY_TCK730ES
SONY_TCK870ES	Technics_RSM02	Technics_RS_B965

JAlbum 7.1