diff --git a/app/routes/admin.py b/app/routes/admin.py
index 827bbbc..1324ec6 100644
--- a/app/routes/admin.py
+++ b/app/routes/admin.py
@@ -6,7 +6,7 @@ from datetime import datetime
 
 from flask import Blueprint, render_template, request, jsonify, redirect, url_for, current_app
 from app.state import current_config
-from app.utils.helpers import load_configs, load_default_sounds, load_soundboard_configs
+from app.utils.helpers import load_configs, load_default_sounds, load_soundboard_configs, write_default_theme
 
 admin_bp = Blueprint('admin', __name__)
 logger = logging.getLogger(__name__)
@@ -210,8 +210,23 @@ def admin_create_theme():
         }
         with open(path, 'w', encoding='utf-8') as f:
             json.dump(template, f, ensure_ascii=False, indent=2)
-        logger.info(f"Neues Theme angelegt: {os.path.relpath(path, base_dir)}")
-        return jsonify({"success": True, "path": os.path.relpath(path, base_dir)})
+    logger.info(f"Neues Theme angelegt: {os.path.relpath(path, base_dir)}")
+    return jsonify({"success": True, "path": os.path.relpath(path, base_dir)})
+
+
+@admin_bp.route('/set_default_theme', methods=['POST'])
+def admin_set_default_theme():
+    data = request.get_json(force=True, silent=True) or {}
+    filename = data.get('filename')
+    if not filename:
+        return jsonify({"success": False, "message": "filename fehlt"}), 400
+    try:
+        write_default_theme(current_app.config['DEFAULT_THEME_FILE'], filename)
+        logger.info(f"Default-Theme gesetzt: {filename}")
+        return jsonify({"success": True, "filename": filename})
+    except Exception as e:
+        logger.exception("Default-Theme setzen fehlgeschlagen")
+        return jsonify({"success": False, "message": str(e)}), 500
     except Exception as e:
         logger.exception("create_theme fehlgeschlagen")
         return jsonify({"success": False, "message": str(e)}), 500
diff --git a/app/routes/api.py b/app/routes/api.py
index 8327d1f..0e1835e 100644
--- a/app/routes/api.py
+++ b/app/routes/api.py
@@ -11,7 +11,7 @@ from flask import Blueprint, jsonify, request, current_app
 
 import app.state as state
 from app.bluetooth.manager import MouldKing, advertiser, tracer
-from app.utils.helpers import load_default_sounds, load_soundboard_configs, load_soundboard_config
+from app.utils.helpers import load_default_sounds, load_soundboard_configs, load_soundboard_config, read_default_theme
 from config import Config
 
 logger = logging.getLogger(__name__)
@@ -451,6 +451,26 @@ def api_soundboard_load():
         return jsonify({"success": False, "message": str(e)}), 500
 
 
+@api_bp.route('/soundboard/load_default', methods=['POST'])
+def api_soundboard_load_default():
+    # Lädt das Standard-Theme, falls gesetzt und noch kein Soundboard aktiv ist
+    try:
+        if state.current_soundboard:
+            return jsonify({"success": True, "soundboard": state.current_soundboard, "already_loaded": True})
+        default_file = read_default_theme(Config.DEFAULT_THEME_FILE)
+        if not default_file:
+            return jsonify({"success": False, "message": "Kein Standard-Theme gesetzt"}), 404
+        sb = load_soundboard_config(default_file,
+                                    current_app.config['SOUNDBOARD_CONFIG_DIR'],
+                                    current_app.config['SOUNDS_DIR'])
+        state.current_soundboard = sb
+        logger.info(f"Standard-Soundboard geladen: {default_file}")
+        return jsonify({"success": True, "soundboard": sb, "default_loaded": True})
+    except Exception as e:
+        logger.exception("Standard-Soundboard laden fehlgeschlagen")
+        return jsonify({"success": False, "message": str(e)}), 500
+
+
 @api_bp.route('/soundboard/play_random', methods=['POST'])
 def api_soundboard_play_random():
     if state.current_soundboard is None:
diff --git a/app/utils/helpers.py b/app/utils/helpers.py
index 22262d2..62c0743 100644
--- a/app/utils/helpers.py
+++ b/app/utils/helpers.py
@@ -144,3 +144,20 @@ def load_soundboard_config(filename, config_dir, sounds_dir=None):
                 for item in data[key]:
                     item.setdefault('base_path', base_sound_dir)
         return data
+
+
+def read_default_theme(path):
+    try:
+        if not os.path.exists(path):
+            return None
+        with open(path, 'r', encoding='utf-8') as f:
+            val = f.read().strip()
+        return val or None
+    except Exception:
+        return None
+
+
+def write_default_theme(path, filename):
+    os.makedirs(os.path.dirname(path), exist_ok=True)
+    with open(path, 'w', encoding='utf-8') as f:
+        f.write(filename)
diff --git a/config.py b/config.py
index 731bdb0..b5a89cc 100644
--- a/config.py
+++ b/config.py
@@ -13,6 +13,7 @@ class Config:
     LOG_DIR    = os.path.join(BASE_DIR, 'logs')
     SOUNDS_DIR = os.path.join(BASE_DIR, 'sounds')
     SOUNDBOARD_CONFIG_DIR = os.path.join(BASE_DIR, 'soundboards')
+    DEFAULT_THEME_FILE = os.path.join(SOUNDBOARD_CONFIG_DIR, 'default_theme.txt')
 
     # Audio-Parameter (für pygame.mixer)
     AUDIO_FREQ        = 44100
diff --git a/templates/admin.html b/templates/admin.html
index e3ba454..852b618 100644
--- a/templates/admin.html
+++ b/templates/admin.html
@@ -84,6 +84,10 @@
                    class="btn btn-sm btn-primary">
                   <i class="bi bi-pencil"></i> Bearbeiten
                 </a>
+                <button class="btn btn-sm btn-outline-success set-default-theme-btn"
+                        data-filename="{{ sb.filename }}">
+                  Als Standard setzen
+                </button>
               </td>
             </tr>
           {% endfor %}
@@ -252,5 +256,26 @@
       alert('Fehler: ' + e.message);
     }
   });
+
+  // Standard-Theme setzen
+  document.querySelectorAll('.set-default-theme-btn').forEach(btn => {
+    btn.addEventListener('click', async () => {
+      const filename = btn.dataset.filename;
+      try {
+        const res = await fetch('/admin/set_default_theme', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({ filename })
+        });
+        const text = await res.text();
+        let json;
+        try { json = JSON.parse(text); } catch (_) { throw new Error('Serverantwort ist kein JSON:\n'+text); }
+        if (!json.success) throw new Error(json.message || 'Fehler');
+        alert('Standard-Theme gesetzt: ' + filename);
+      } catch (e) {
+        alert('Fehler: ' + e.message);
+      }
+    });
+  });
 </script>
 {% endblock %}
diff --git a/templates/soundboard.html b/templates/soundboard.html
index 237efb1..219e8a7 100644
--- a/templates/soundboard.html
+++ b/templates/soundboard.html
@@ -288,14 +288,18 @@
   // Reihenfolge: Status prüfen, dann ggf. Theme laden
   (async () => {
     await updateAutoStatus();
+    // Wenn noch kein Theme aktiv ist, versuche Standard-Theme zu laden
+    const statusRes = await fetch('/api/soundboard/status');
+    const statusData = await statusRes.json();
+    if (!statusData.active && !statusData.current_theme) {
+      await fetch('/api/soundboard/load_default', { method: 'POST' });
+    }
     if (selectEl && selectEl.value) {
-      // Wenn bereits ein Theme aktiv ist, nicht erneut laden (würde Auto stoppen)
-      const statusRes = await fetch('/api/soundboard/status');
-      const statusData = await statusRes.json();
-      if (!statusData.active || statusData.current_theme !== selectEl.value) {
+      const statusRes2 = await fetch('/api/soundboard/status');
+      const statusData2 = await statusRes2.json();
+      if (!statusData2.active || statusData2.current_theme !== selectEl.value) {
         loadSoundboard(selectEl.value);
       } else {
-        // Theme-Daten nachladen ohne Auto zu stoppen
         const cur = await fetch('/api/soundboard/current');
         const curData = await cur.json();
         if (curData.soundboard) {