Puedes utilizar altavoces de 4 ohm con un amplificador de 8 ohm si empleas precaución y entiendes cómo funciona la impedancia.

Potencia: 150 W. Altavoz de 12. 8 Ohms. Tweeter piezo. Conex: Speakon y Jack. Potencia programa a 8 ohms 300W Potencia pico a 8 ohms 600W Sensibillidad (1W/1m) 97dB Tweeter titanio...

4 x 4,650 Watts into 4 Ohms, 4 x 2,500 Watts into 8 Ohms. 4 Channel Class TD Switching power amplifier. Create SUPER sound quality,good for dual 18"/21" subwoofer.

8 & 1 - Soory @ohms___ twitter.com/clarajeffery/s…
Wes Andrews

Amplifier board Module chip DC8-24V TPA3118 PBTL 60W Mono amplifier Digital audio amplifier board Module chip 1X60W 4-8 Ohms replace TPA3110 for Arduino pic.twitter.com/nXAqqRqO2M
Rochas Divine Mart

[R$ 274,69 (20.11%)] Subwoofer 8'' 175W RMS 4 OHMS Audiophonic dquanto.com/product/65/508…
dquanto

Check out 50 Allen Bradley 1/8 watt Resistors,33 ohms, RCQ5GF33QJ,Carbon Composition #AllenBradley ebay.us/4umlU0 via @eBay
Michael C Bishop

Thomann Europe Price drops : Ortega S ONE Akustik-Box 6,5" ift.tt/2INJFNe Acoustic Speaker Cabinet Equipped with: 6.5" Speaker and 3" tweeter, Front Loaded, Rated power: 150 W, Impedance: 8 ohms, Cabinet construction: closed, Input: 1x 6.3 mm jack, Handle, Pole... 1… pic.twitter.com/SBudhYKGmx

Check out Vintage Knight KN2222 3 Way Speaker System 15 Watts 8 Ohms. Tested. #Knight ebay.us/ICe6T2 via @eBay
DealBrite eBay