Sennheiser HD 300 Overview
The Sennheiser HD 300 PROtect are closed-back, over-ear studio monitor headphones offering high-resolution audio reproduction and switchable peak level protection for musicians, audio engineers, and event staff in broadcast, studio, and live stage applications. The precision-diaphragm dynamic drivers produce a wide frequency response of 6 Hz to 25 kHz with low distortion and a maximum SPL of 123 dB. Switch on the Active Gard hearing protection technology to limit levels above 110 dBA for safe listening even with unpredictable source volumes. The HD 300 PROtect’s circumaural, closed-back design provides up to 32 dB of passive isolation from ambient noise.
Thick ear cushions and headband padding ensure comfortable wearing for long listening sessions. The detachable 4.9′ single-sided cable is terminated with a 3.5mm stereo mini jack, and may be swapped for other Sennheiser modular cables (available separately). A 1/4″ TRS adapter is included to allow easy connectivity with mixers, dedicated headphone amplifiers, and audio interfaces. The HD 300 PROtect headphones fold for compact storage and transport.

DW 5002AH4 DOUBLE PEDAL ACCELERATOR DWCP5002AH4
YAMAHA LP1B PEDAL UNIT FOR P121, P125, P225, DGX670, P-S500, P-525 BLACK
GIBRALTAR SC-4420S SUPER HI-HAT CLUTCH
EVANS 12 GENERA G1 COATED TOM HEAD
MEINL FD16BE FRAME DRUM
AKG PERCEPTION 220
SHURE BETA91A CONDENSER BOUNDARY MICROPHONE
EVANS MIN-EMAD SINGLE-MEDIUM
AKG PERCEPTION LIVE P4
YAMAHA YSL 620 Bb/F PROFESSIONAL TENOR TROMBONE GOLD LACQUER
YAMAHA P121M PE POLISHED EBONY 121CM
LINE 6 RELAY G10II DIGITAL WIRELESS GUITAR SYSTEM
KLOTZ KIK 3M INSTRUMENT CABLE BLACK
ERNIE BALL NOT EVEN SLINKY 12-56
K&M 23150 MIC DESK STAND
IBANEZ GSA60WNF WALNUT FLAT
GIBRALTAR SC-4B TENSION RODS
ERNIE BALL EARTHWOOD MEDIUM 13-56
STAGG SCL70 CLASSICAL GUITAR WITH SPRUCE TOP NATURAL SATIN
YAMAHA YTR 8345G CUSTOM Bb TRUMPET GOLD BRASS BELL
GRAPHTECH BLACK TUSQ XL PT-1200-00 BASS NUT FLAT SLOTTED 4-STRING
YAMAHA BB 234 BLACK
PRS TREMONTI - MT15 HEAD
MOOER X2 SERIES DRUMMER PEDAL
DADDARIO ACCESSORIES FINGER PICKS MEDIUM 5 PACK
EVANS EC2 COATED 10 INCH
SHURE BLX14/SM31 FITNESS HEADSET WIRELESS SYSTEM M17
YAMAHA SE122 PE
PROTECTION RACKET CAJ2 CAJON BAG
STAGG MUS-LED6 MUSIC STAND LIGHT
YAMAHA YTC5 HEADSTOCK TUNER
IK MULTIMEDIA IKLIP XPAND STAND
AKG WMS40 MINI VOCAL SET ISM2
DADDARIO EJ26 PHOSPHOR BRONZE
GRETSCH G5655T ELECTROMATIC CENTER BLOCK JR WITH BIGSBY IL CASINO GOLD
AKG K52 HEADPHONES 