Seismic Audio Grindhouse Speakers - GH28L - Passive Dual 8 Inch 2-Way PA/DJ Loudspeaker Cabinet - 900 Watt Full Range PA/DJ Band Live Sound Speaker

The GH28L tackles that classic PA problem where vocals get buried in the mix. Those dual 8-inch woofers give you fuller midrange than a single driver can deliver, while the horn tweeter cuts through stage wash and room chatter. If you've been frustrated with single 8-inch boxes that leave your vocals sounding thin, this dual-driver design fills out that crucial vocal range where audiences need to understand every word.

This is a passive cabinet, so you'll need to pair it with your own amplifier — 450 watts RMS, peaking at 900. The 93 dB sensitivity means it doesn't demand massive power to get loud, but having that headroom keeps things clean when the drummer gets excited. At 4 ohms, it plays well with most power amps without weird impedance matching issues.

The bass reflex tuning extends low-end response down to 50 Hz, which is respectable for dual 8s. You're not getting subwoofer-level thump, but you'll have enough bottom end for most full-band applications. The MDF cabinet feels solid without being a back-breaker at 26 pounds, and the aviation-grade carpet covering should survive your load-ins.

Where this speaker shines is vocal-forward applications — worship services, acoustic gigs, small club shows where people actually need to hear the words. It also works well as a stage monitor when you need both vocals and instruments in your mix without the muddiness that single drivers can produce.

Bottom line: If you need clear vocal reproduction for venues up to 150 people and want more midrange presence than single 8-inch speakers provide, the GH28L delivers that without requiring a massive amplifier investment.

Technical Specifications

• Power (RMS): 450 Watts
• Power (Peak): 900 Watts
• Amplifier Type: Passive (requires external amplifier)
• Woofer: Dual 8" High Output Mid/Low Ribbed Cone
• HF Driver: 1" Horn Tweeter, 75 Watts, Wide Dispersion
• Frequency Response: 50 Hz - 20 kHz
• Sensitivity: 93 dB
• Impedance: 4 Ohms
• Inputs: 1/4" TS and Raw Speaker Wire Terminals
• Cabinet: MDF Acoustic Enclosure, Bass Reflex Tuned
• Covering: Aviation Grade Carpet, Black
• Dimensions: 26.25" x 11.25" x 9.5"
• Weight: 26 lbs
• Warranty: One Year
• Recommended For: Clubs, DJ events, stage monitors, worship venues

Frequently Asked Questions

What amplifier power do I need for the GH28L?

You'll want 450-600 watts RMS into 4 ohms to properly drive these speakers. The 93 dB sensitivity means they don't need massive power to get loud, but having adequate headroom keeps your sound clean during dynamic peaks. Most professional power amps in the 500-800 watt range pair well with the GH28L.

Do I need a subwoofer with these speakers?

For vocal-focused applications like worship or acoustic shows, the dual 8s provide sufficient low-end down to 50 Hz. But if you're playing bass-heavy material — hip-hop, EDM, rock with dropped tunings — you'll want to add a sub for the deep bass impact that 8-inch drivers can't fully reproduce.

How does this compare to a single 12-inch speaker?

The dual 8-inch design gives you better vocal clarity and midrange definition than most single 12s, which is why it works well for speech-heavy applications. A single 12 usually delivers more overall volume and low-end punch, but may not articulate vocals as clearly. Choose the GH28L when vocal intelligibility trumps maximum bass output.

What cables do I use to connect these?

Use proper speaker cables — either 1/4-inch TS cables from your amp's speaker outputs, or raw speaker wire to the binding posts. Never use instrument cables or XLR cables for this connection. Make sure your speaker cables are rated for your amplifier's power output.